In recent years, gas vehicles have been favored by the market due to their advantages of energy conservation and environmental protection. In the case of a weak demand in the commercial vehicle market as a whole, various OEMs have turned their attention to gas vehicles. In the past 2012, natural gas vehicles have also become a bright spot for the commercial vehicle market. Natural gas engines, which are the heart of natural gas vehicles, are also being matured and improved in the increasingly hot markets. Heavy-duty natural gas engines are among the best.
â— Relying on the advantages of excellence
China National Heavy Duty Natural Gas Engine is China National Heavy Duty Truck Co., Ltd. to fully implement the internationalization strategy, further enhance the company's independent innovation capability and core competitiveness, and make CNHTC's power business bigger and stronger. Based on domestic and foreign market demand and the development trend of heavy truck technology, the original WD615 Based on the National III series diesel engine, the products were redesigned and manufactured.
"In addition to the addition of the gas intake system and electronic control system, the natural gas engine has been improved in five major ways compared to the WD615 State III diesel engine. The first is that the intake pipe is designed as an intermediate intake to optimize the distribution of the mixed gas. The intake of each cylinder of the engine is more uniform; the second is that the piston adopts the design of the internal cooling oil passage and the combustion chamber is in a basin shape, which is more suitable for the combustion characteristics of natural gas and makes the combustion more fully; third, the piston ring specially designed for the natural gas engine is adopted, greatly Reduced engine oil consumption; Fourth, the use of the British HolsetHX40G type water-cooled exhaust turbocharger; Fifth, choose a special material for the valve and valve seat, and change the angle of the exhaust cone seal to extend the service life. In addition, most of the other parts of natural gas engines are common with diesel engines." Jiang Yanxian, deputy general manager of China National Heavy Duty Truck (Hong Kong) Co., Ltd. Jinan Power Department (Fuqiang Power), introduced the concept.
The main components of China National Heavy Duty Natural Gas Engine are selected by international brands or domestic first-class suppliers. The redesigned engine on the basis of WD615 is fully suitable for the combustion characteristics of natural gas. The power, reliability and economic performance of the entire aircraft are superior to those of domestic ones. product. Therefore, CNHTC's natural gas engines also have their own tendencies and standards in the selection of key components.
“In selecting the gas supply system, we are paying attention to the cost of use and maintenance under the premise of ensuring reliability. Secondly, for the selection of electronic control system components (such as various types of sensors), the accuracy of components is mainly considered. And reliability. In addition, in the selection of mechanical parts, the focus is to consider the versatility and reliability of parts and diesel engines." Jiang told reporters in the first.
Since CNHTC's natural gas engine was put on the market, it not only gained market recognition, but also gained users' reputation. In 2012, the T12 natural gas engine produced by Sinotruk won the “Commercial I trust†for its outstanding performance in the truck field and won the second “Rundi Cup†sponsored by “Commercial Automotive Newsâ€. "Car Power Award", this is already the CNHTC engine won two consecutive years in this project. The good reputation is inseparable from the excellent product quality, and the technological advancement of CNHTC's natural gas engine has increased its quality assurance.
According to Jiang's introduction, the technological advancement of CNHTC's natural gas engines is mainly reflected in two aspects. In the aspect of the main body, the intake pipe adopts the middle intake, the four-valve structure of the cylinder head, and the spark plug middle to ensure that the efficiency of the engine's intake and exhaust is high, the work of each cylinder is more uniform, and combustion is more thorough and thorough. Matching the perfect water-cooled exhaust turbocharger and electronically controlled exhaust gas control valve device, the engine's high torque value and large torque speed range are basically the same as those of the same-power diesel engine.
In the EPR gas electronic control system, continuous-flow fuel control has higher control accuracy and responsiveness and can achieve better fuel economy and emissions. The fuel mix is ​​better, the engine fuel concentration is better for each cylinder, and leaner combustion is allowed, and the engine's exhaust temperature is low. In addition, it is suitable for lower fuel pressures, down to 3 KPa; it is suitable for LNG, an oil-free dry gas and gas with higher impurity content, which has better durability than the nozzle.
â— Quality Excellence Market "Test Gold"
Since the heavy-duty natural gas engine began mass production in 2010, sales volume has doubled every year. In the domestic market, CNHTC's natural gas vehicles are located throughout the country, particularly in Shanxi, Shandong, Hebei, Northeast China, Xinjiang, Ningbo, Xiamen, and Qingdao. In foreign markets, CNHTC's natural gas engines also achieved good results. Foreign markets include Thailand, Malaysia in Southeast Asia, and Chile in South America. Among them, heavy truck natural gas heavy trucks accounted for nearly 70% of the Thai natural gas heavy truck market.
Sales volume is the touchstone of product quality. Good sales performance proves that CNHTC's natural gas engine has an advantage in market competition.
"The competitive advantages of CNHTC's natural gas engines are mainly reflected in four aspects. First, the power is strong. CNHTC's natural gas engine has strong power, high power, and low-speed torque. At present, CNHTC's natural gas engine is the same engine at home and abroad. The power and torque are the most important.The second is the economical efficiency.The components of CNHTC natural gas engine and the WD615 diesel engine have strong universality, sufficient spare parts supply, convenient maintenance and maintenance, and greatly reduce the maintenance cost.The use and maintenance cost of the engine gas control system is low. The system has strong applicability and has a low gas consumption compared with domestic natural gas engines of the same displacement.The third is high reliability, inheriting the unique frame structure of WD615 diesel engine, enhanced body strength, strict quality management system and international The supporting products of the first-class domestic component suppliers ensure the reliability of the whole machine.Fourth, low-emission and high-environmental protection, the emission level of heavy-duty natural gas engine is better than the limit of the national V regulations, and the carbon emission is greatly reduced. At the same time, a reinforced body is used, which effectively reduces vibration and reduces noise.†He introduced the reporters.
â— Comprehensive service guarantee
If the product represents a company's hard power, then after-sales service can reflect the level of corporate soft power. With the continuous production of heavy-duty natural gas engine mass production and increasing market share, the construction of natural gas engine after-sales service network is also increasingly perfect.
According to reports, China National Heavy Duty Truck has more than 1,500 service stations throughout the country. To make natural gas vehicles better promoted, the group's sales companies organize training of national service stations. After the training is completed, the employment permit will be issued to qualified service personnel, and the service personnel will hold the certificate at the service station. In addition, the company has set up a dedicated natural gas service team and technical support for the service stations in the zoning areas. At the same time, the company has also established a special QQ group for the exchange of natural gas technical services. Service personnel at various service stations can conduct technical exchanges here.
“In order to allow users to make better use of natural gas vehicles, we will conduct relevant training on the operation of users before the delivery. The main difficulty in the promotion of natural gas vehicles is in service, because the current service stations are mainly based on the maintenance of diesel vehicles. The maintenance skills of service personnel can not be improved in a short period of time through several trainings of the manufacturers.We have already conducted a number of service stations for relevant training, and even some service stations have received many trainings.However, theoretical training should be It will take time for it to become operational," Jiang said earlier.
Although the market share of natural gas vehicles is still relatively small, as a production company, heavy-duty trucks are very concerned about the after-sales service of natural gas vehicles from the very beginning.
“What we value most now is the service. The service can't keep up. Natural gas vehicles are difficult for users to accept. For example, the breakdown of diesel vehicles can be solved within a few hours, while the natural gas vehicle takes several days to resolve. In this case, the user will not choose a natural gas vehicle at all.Of course, this also involves the supply of spare parts.The accessories are proportional to the amount of vehicle ownership, the amount of possession is small, the supply of accessories is relatively small, and the service time will be elongated. Currently, the supply of spare parts for CNHTC natural gas engines is mainly supplied by the existing mature parts sales and supply network of CNHTC, and each sales area has its own accessories center library, which can ensure adequate supply of accessories, Jiang told reporters first.
In order to ensure that the users can solve the problems within the shortest time, SINOCHEM has formed a flight service team consisting of more than 20 people. If the service station encounters problems that cannot be solved, the flight service team's personnel will arrive in the shortest possible time to help the service station solve the problem. In order to improve the service station's ability to repair natural gas vehicles, the company requires that members of the flight service team not be able to directly replace the service personnel of the service station to repair the vehicles. Only local service personnel can be instructed to perform repairs.
"Shouqi Heavy's skill training for service personnel servicing service stations at various service stations is prioritized in areas with orders for heavy-duty natural gas vehicles. Prior to delivery, the company will complete the training of service stations near the location of the order. Prior to this, We will allow local branches to report areas where there may be orders for natural gas vehicles, and first let service station service personnel in these areas come to the group to participate in training.Once a natural gas vehicle is promoted to the region, we will also conduct service to service stations that have previously participated in training. Second training." Jiang said earlier.
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